Maturity and Other Reproductive Traits of the Kanahebi Lizard &lt;i&gt;Takydromus tachydromoides&lt;/i&gt; (Sauria, Lacertidae) in Mito

Takenaka, Sen

doi:10.5358/hsj1972.9.2_46

Cited by 10 publications

(6 citation statements)

References 14 publications

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“…In laboratory, we also found that captive females are able to lay 2-4 clutches within two months from June to July (personal observations). Repeated producing clutches within a short time span has also been reported in several other Takydromus species [45][46][47][48][49], especially well noted in a captive case of T. stejnegeri which laid four clutches within 40 days [50]. Previous studies of lizard life history have suggested the classic continuum of reproductive pattern: small clutch size with multiple clutches within an extended breeding season, versus large clutch size only once in a short breeding season [9,39,51,52].…”

Section: High Fecundity and Low Survival Rate In High Disturbance Habmentioning

confidence: 73%

Long-term monitoring reveals invariant clutch size and unequal reproductive costs between sexes in a subtropical lacertid lizard

Lin

Chen

et al. 2020

Zoological Lett

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Based on 20,000 records representing c. 11,000 individuals from an 8-year capture-mark-recapture (CMR) study, we tested and confirmed a new case of invariant clutch size (ICS) in a sexually dichromatic lacertid lizard, Takydromus viridipunctatus. In the grassland habitat of the early succession stage, females showed strictly low and invariant clutch size, multiple clutches in a breeding season, high reproductive potential, and annual breeding cycles that correspond to the emergence of male courtship coloration. The hatchlings mature quickly, and join the adult cohort for breeding within a few months, whereas adults show low survival rates and a short lifespan, such that most die within one year. Mortality increased in both sexes during the breeding season, especially in females, indicating an unequal cost of reproduction in survival. These life history characters may be explained by two non-exclusive hypotheses of ICS—arboreal hypothesis and predation hypothesis—within the ecological context of their habitat. Our study highlights a confirmed case of ICS, which adapts well to this r-selected grassland habitat that experiences seasonal fluctuation and frequent disturbance.

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Section: High Fecundity and Low Survival Rate In High Disturbance Habmentioning

confidence: 73%

Long-term monitoring reveals invariant clutch size and unequal reproductive costs between sexes in a subtropical lacertid lizard

Lin

Chen

et al. 2020

Zoological Lett

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“…2). The reproductive cycle of D. swinhonis in Hyuga City is thus similar to many temperate reptiles, including lizards that are native to Japan, which reproduce from spring to summer [5,8,27]. The D. swinhonis population investigated in this study was introduced into the temperate zone of Japan from subtropical and tropical zones in Taiwan.…”

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Reproductive cycle and maturation of Swinhoe’s tree lizard (<i>Diploderma swinhonis</i> (Günther, 1864)) in Hyuga City, Miyazaki Prefecture, Japan

Imatake

Imaizumi

Ohashi

et al. 2020

The Journal of Veterinary Medical Science

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Swinhoe’s tree lizard ( Diploderma swinhonis ) is an arboreal agamid that is native to Taiwan. The species has been introduced to some areas of Japan and is regarded as an invasive alien species. In 2016, a nonnative population of D. swinhonis was discovered in Hyuga City, Miyazaki Prefecture, Japan, but little information was available on the ecology of the population at the time. The main purpose of this study was therefore to investigate the reproductive cycle and maturation of this population. Field research was conducted from 2017 to 2019, and 764 lizards were collected. Euthanized lizards were dissected and the reproductive organs were examined to determine the reproductive period, clutch size, clutch frequency and size at sexual maturity. Females with oviductal eggs or vitellogenic ovarian follicles were observed from May to October. Clutch size ranged from 2 to 8, and clutch frequency was more than twice a year. In males, spermiogenesis started in early May and testicular regression was observed in September. Males with spermatozoa in the epididymides were found from May to November. Minimum snout-vent length at sexual maturity was 50.2 mm in females and 53.0 mm in males. Comparisons of the findings of this study and reports from Taiwan suggest that the nonnative population of D. swinhonis in Hyuga City has a higher fecundity than populations in Taiwan. It is therefore considered necessary to exterminate the population in Hyuga City before this species colonizes other areas.

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“…All of the older females had such scars from midApril to mid-August, but only 22.7 % of female yearlings had the scars in mid-April, and 90 or more of them had the scars after May. The lizards were expected to mature in May as yearlings (Telford, 1969;Jackson and Telford, 1975;Takenaka, 1981). The mean SVL and the mean body weight of adult lizards (yearlings and older lizards) after August when growth had almost stopped were 55. mm and 3.1 ~0,1 g for females (n -----86), respectively.…”

Section: Population Structurementioning

confidence: 99%

Spatial relationship among individuals of the Japanese lacertid Takydromus tachydromoides (Sauria, Lacertidae)

Takeishi

Ono

1986

Ecological Research

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The home range of Takydromus tachydromoides was studied in a grassland area from April 1977 to November 1978. The mean size of home range did not differ markedly between sexes; 136.5 m 2 for males and 130.8 m z for females. Home ranges of adults overlapped greatly in each sex, and the lizard was considered to be non-territorial. Individuals showed return movement to a definite area (sleeping site) within the home range, and the home range did not shift within a year or between years. Characteristics of the home range of this grassland-inhabiting lizard were discussed in relation to resource abundance and predation pressure.

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Maturity and Other Reproductive Traits of the Kanahebi Lizard <i>Takydromus tachydromoides</i> (Sauria, Lacertidae) in Mito

Cited by 10 publications

References 14 publications

Long-term monitoring reveals invariant clutch size and unequal reproductive costs between sexes in a subtropical lacertid lizard

Long-term monitoring reveals invariant clutch size and unequal reproductive costs between sexes in a subtropical lacertid lizard

Reproductive cycle and maturation of Swinhoe’s tree lizard (<i>Diploderma swinhonis</i> (Günther, 1864)) in Hyuga City, Miyazaki Prefecture, Japan

Spatial relationship among individuals of the Japanese lacertid Takydromus tachydromoides (Sauria, Lacertidae)

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